Add PresentCodeRedemption

Fixes #383 and family share

src/Plugin.InAppBilling/Converters.android.cs

@@ -4,9 +4,9 @@
 
 namespace Plugin.InAppBilling
 {
-    public static class Converters
+    internal static class Converters
     {
-        public static InAppBillingPurchase ToIABPurchase(this Purchase purchase)
+        internal static InAppBillingPurchase ToIABPurchase(this Purchase purchase)
         {
             var finalPurchase = new InAppBillingPurchase
             {
@@ -35,7 +35,7 @@ public static InAppBillingPurchase ToIABPurchase(this Purchase purchase)
             return finalPurchase;
         }
 
-        public static InAppBillingPurchase ToIABPurchase(this PurchaseHistoryRecord purchase)
+        internal static InAppBillingPurchase ToIABPurchase(this PurchaseHistoryRecord purchase)
         {
             return new InAppBillingPurchase
             {
@@ -52,7 +52,7 @@ public static InAppBillingPurchase ToIABPurchase(this PurchaseHistoryRecord purc
             };
         }
 
-        public static InAppBillingProduct ToIAPProduct(this SkuDetails product)
+        internal static InAppBillingProduct ToIAPProduct(this SkuDetails product)
         {
             return new InAppBillingProduct
             {

src/Plugin.InAppBilling/InAppBilling.apple.cs

@@ -89,6 +89,18 @@ internal static bool HasFamilyShareable
         }
 #endif
 
+
+        /// <summary>
+        /// iOS: Displays a sheet that enables users to redeem subscription offer codes that you configure in App Store Connect.
+        /// </summary>
+        public override void PresentCodeRedemption() 
+        {
+#if __IOS__ && !__MACCATALYST__
+            if(HasFamilyShareable)
+                SKPaymentQueue.DefaultQueue.PresentCodeRedemptionSheet();
+#endif
+        }
+
         /// <summary>
         /// Gets if user can make payments
         /// </summary>
@@ -148,6 +160,7 @@ public async override Task<IEnumerable<InAppBillingProduct>> GetProductInfoAsync
 				CurrencyCode = p.PriceLocale?.CurrencyCode ?? string.Empty,
                 AppleExtras = new InAppBillingProductAppleExtras
                 {
+                    IsFamilyShareable = HasFamilyShareable && p.IsFamilyShareable,
                     SubscriptionGroupId = HasSubscriptionGroupId ? p.SubscriptionGroupIdentifier : null,
                     SubscriptionPeriod = p.ToSubscriptionPeriod(),
                     IntroductoryOffer = HasIntroductoryOffer ? p.IntroductoryPrice?.ToProductDiscount() : null,

src/Plugin.InAppBilling/Shared/BaseInAppBilling.shared.cs

@@ -51,14 +51,14 @@ public abstract class BaseInAppBilling : IInAppBilling, IDisposable
         public abstract Task<IEnumerable<InAppBillingProduct>> GetProductInfoAsync(ItemType itemType, params string[] productIds);
 
 
-	
-		/// <summary>
-		/// Get all current purchases for a specific product type. If verification fails for some purchase, it's not contained in the result.
-		/// </summary>
-		/// <param name="itemType">Type of product</param>
+
+        /// <summary>
+        /// Get all current purchases for a specific product type. If verification fails for some purchase, it's not contained in the result.
+        /// </summary>
+        /// <param name="itemType">Type of product</param>
         /// <param name="doNotFinishTransactionIds">List of ids not to finish (iOS only)</param>
-		/// <returns>The current purchases</returns>
-		public abstract Task<IEnumerable<InAppBillingPurchase>> GetPurchasesAsync(ItemType itemType, List<string> doNotFinishTransactionIds = null);
+        /// <returns>The current purchases</returns>
+        public abstract Task<IEnumerable<InAppBillingPurchase>> GetPurchasesAsync(ItemType itemType, List<string> doNotFinishTransactionIds = null);
 
 
 
@@ -67,7 +67,7 @@ public abstract class BaseInAppBilling : IInAppBilling, IDisposable
         /// </summary>
         /// <param name="itemType">Type of product</param>
         /// <returns>The current purchases</returns>
-        public virtual Task<IEnumerable<InAppBillingPurchase>> GetPurchasesHistoryAsync(ItemType itemType) => 
+        public virtual Task<IEnumerable<InAppBillingPurchase>> GetPurchasesHistoryAsync(ItemType itemType) =>
             Task.FromResult<IEnumerable<InAppBillingPurchase>>(new List<InAppBillingPurchase>());
 
         /// <summary>
@@ -154,5 +154,10 @@ public virtual void Dispose(bool disposing)
         /// <param name="purchaseToken"></param>
         /// <returns></returns>
         public virtual Task<bool> AcknowledgePurchaseAsync(string purchaseToken) => Task.FromResult(true);
+
+        /// <summary>
+        /// iOS: Displays a sheet that enables users to redeem subscription offer codes that you configure in App Store Connect.
+        /// </summary>
+        public virtual void PresentCodeRedemption() { }
     }
 }

src/Plugin.InAppBilling/Shared/IInAppBilling.shared.cs

@@ -119,5 +119,10 @@ public interface IInAppBilling : IDisposable
         /// </summary>
         bool CanMakePayments { get; }
 
-	}
+
+        /// <summary>
+        /// iOS: Displays a sheet that enables users to redeem subscription offer codes that you configure in App Store Connect.
+        /// </summary>
+        void PresentCodeRedemption();
+    }
 }